(2)LBA mode
Logical address assignment in the LBA mode starts from physical cylinder 0, physical head 0, and physical sector 1. The logical address is advanced at the subsequent sector from the last sector of the current track. The first physical sector of the subsequent physical track is the consecutive logical sector from the last sector of the current physical track.
Figure 6.6 shows an example of (assuming there is no track skew).
Physical sector |
|
| ||
| 1 | 2 | 3 |
|
Physical cylinder 0 |
|
|
|
|
LBA | LBA | LBA |
| |
Physical head 0 | 0 | 1 | 2 |
|
|
|
|
| |
| 1 | 2 | 3 |
|
Physical cylinder 0 |
|
|
| |
LBA | LBA | LBA |
| |
Physical head 1 | 798 | 799 | 800 |
|
ex: Zone 0
Physical parameter
- Physical sector: 1 to 798
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
795 796 797 798
LBA LBA LBA LBA 794 795 796 797
795 796 797 798
LBA LBA LBA LBA 1592 1593 1594 1595
Figure 6.6 Address translation (example in LBA mode)
6.3Power Save
The host can change the power consumption state of the device by issuing a power command to the device.
6.3.1Power save mode
There are four types of power consumption state of the device including active mode where all circuits are active.
In the power save mode, power supplying to the part of the circuit is turned off. There are three types of power save modes:
∙Idle mode
∙Standby mode
∙Sleep mode
(1)Active mode
In this mode, all the electric circuit in the device are active or the device is under seek, read or write operation.
6 - 8 |
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